Suspension tower portion structure of vehicle

ABSTRACT

An upper face portion of a suspension tower portion of a vehicle comprises an fastening face portion where plural fastening portions to which an upper-side attached portion of a suspension is fixedly fastened are provided and a top face portion which is provided at a higher level than the fastening face portion so as to face the upper-side attached portion of the suspension, the top face portion being connected to a central portion of the fastening face portion via a vertical wall portion. An inner-peripheral-side rib is provided on an inner-peripheral side of the vertical wall portion.

BACKGROUND OF THE INVENTION

The present invention relates to a suspension tower portion structure ofa vehicle.

A suspension tower portion which is configured such that an upper endportion of a suspension is fixedly fastened to an upper face portion ofthe suspension tower portion and a rib is provided at the upper faceportion, thereby improving the rigidity, in a vertical direction, of thesuspension tower portion is known.

Japanese Patent Laid-Open Publication Nos. 2015-067067 or 2015-093508,for example, disclose a two-stage structure of the upper face portion ofthe suspension tower portion which comprises an fastening face portionfor fastening the upper end portion of the suspension and a top faceportion provided at a higher level than the fastening face portion andconnected to the fastening face portion via a ring-shaped rib. At anupper face of this fastening face portion of the suspension towerportion is further provided a radial-shaped rib which extends in aradial direction on an outer-peripheral side of the ring-shaped rib, andthe rigidity of the upper face portion is increased by the ring-shapedrib and the radial-shaped rib.

Herein, providing the rib which projects further upward from the topface of the top face portion for increasing the rigidity, in thevertical direction, of the suspension tower portion causes a large sizeof the suspension tower portion extending upward. In this case, since agap between the top face portion and an engine hood (bonnet) becomessmall, it is suppressed that the engine hood bends downward in a vehiclecollision, so that there is a concern that the impact absorptionperformance may be deteriorated.

Meanwhile, in a case in which the suspension tower portion is arrangeddownward as a whole for ensuring a sufficient gap between the enginehood and the suspension tower portion, a vertical length of thesuspension becomes shorter accordingly. In this case, since the amountof stroke of the suspension decreases, the riding comfort may bedeteriorated. That is, the suspension tower portion has a lowflexibility of layout position, in the vertical direction, of the topface portion, in particular, so that it may be difficult to form the ribprojecting further upward from the upper face of the top face portion.

SUMMARY OF THE INVENTION

The present invention has been devised in view of the above-describedproblems, and an object of the present invention is to provide asuspension tower portion structure of a vehicle which can improve therigidity, in the vertical direction, of the suspension tower portion,suppressing the suspension tower portion extending upward from beinglarge sized.

The present invention is a suspension tower portion structure of avehicle, wherein an upper face portion of a suspension tower portioncomprises an fastening face portion where plural fastening portions towhich an upper end portion of a suspension is fixedly fastened areprovided and a top face portion which is provided at a higher level thanthe fastening face portion so as to face the upper end portion of thesuspension, the top face portion being connected to a central portion ofthe fastening face portion via a vertical wall portion, and aninner-peripheral-side rib is provided on an inner-peripheral side of thevertical wall portion.

According to the present invention, the rigidity, in the verticaldirection, of the suspension tower portion can be increased effectively,without increasing the length, in the vertical direction, of thesuspension tower portion, by providing the inner-peripheral-side rib ata lower face of the top face portion. That is, the inner-peripheral-siderib increases the secondary cross-sectional moment of a cross section,in the vertical direction, of a portion where this rib is provided, sothat the rigidity, in the vertical direction, of the suspension towerportion can be improved effectively. Herein, the above-described ribincludes any rib formed in any manner as long as it projects downwardfrom a lower face of the top face portion. That is, a rib body which hasbeen formed separately may be joined together, the rib may be formedintegrally by a raw material, the rib may be formed by recessing aportion of the top face portion downward, or the rib may be formed as avertical wall portion extending vertically.

In an embodiment of the present invention, an outer-peripheral-side ribis provided at the fastening face portion on an outer-peripheral side ofthe vertical wall portion, and the inner-peripheral-side rib and theouter-peripheral-side rib are continuously connected via the verticalwall portion.

According to this embodiment, since the inner-peripheral-side rib andthe outer-peripheral-side rib are continuously connected via thevertical wall portion, a portion having the rigidity increased by theinner-peripheral-side rib and another portion having the rigidityincreased by the outer-peripheral-side rib are continuous from eachother, without being separated. Thereby, a radial-shaped rib whichcontinuously extends from the inner-peripheral side to theouter-peripheral side of the vertical wall portion can be formed by theinner-peripheral-side rib and the outer-peripheral-side rib, therigidity, in the vertical direction, of an upper portion of thesuspension tower portion can be improved over a wide range from the topface portion to the fastening face portion. Thereby, the rigidity, inthe vertical direction, of the suspension tower portion can be improvedmore effectively.

In another embodiment of the present invention, an outer-peripheral wallportion which extends downward from an outer edge of the fastening faceportion is provided, and the outer-peripheral-side rib extends to theouter-peripheral wall portion.

According to this embodiment, the rigidity of the outer-peripheral-siderib can be increased by making the outer-peripheral-side rib properlylong and extend to the outer-peripheral wall portion. Accordingly, therigidity, in the vertical direction, of the suspension tower portion canbe improved further effectively.

In another embodiment of the present invention, at the top face portionare formed an opening portion which faces the upper end portion of thesuspension and an opening-portion rib which projects downward at aperiphery of the opening portion, and the opening-portion rib and thevertical wall portion are connected by the inner-peripheral-side rib.

According to this embodiment, the rigidity of the top face portion canbe improved by the opening-portion rib and the rigidity of the top faceportion can be further improved by connecting the opening-portion riband the vertical wall portion via the inner-peripheral-side rib.Accordingly, the rigidity, in the vertical direction, of the suspensiontower portion can be improved further effectively.

Other features, aspects, and advantages of the present invention willbecome apparent from the following description which refers to theaccompanying drawings.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a perspective view showing a suspension tower portionstructure according to an embodiment of the present invention.

FIG. 2 is a plan view of the suspension tower portion structure of FIG.1.

FIG. 3 is a sectional view taken along line of FIG. 2.

FIGS. 4A, 4B and 4C are views schematically showing deformation of thesuspension tower portion structure.

FIG. 5 is a perspective view showing a suspension tower portionstructure according to a modification.

DETAILED DESCRIPTION OF THE INVENTION

Embodiments of the present invention will be described referring to theaccompanying drawings. While a one-side (right side) part, in a vehiclewidth direction, of a suspension tower portion structure will bedescribed in the flowing description, the other-side (left side) part isthe same as the one-side part. In the figures, forward/rearward,inward/outward, and upward/downward directions show longitudinal, width,and vertical directions of a vehicle, respectively, unless there is anyspecial explanation.

FIG. 1 shows a suspension tower portion 1 of the vehicle according to anembodiment of the present invention. As shown in FIG. 1, the suspensiontower portion 1 is provided to extend in the vehicle width directionbetween a front side member and an apron reinforcement which extend inthe vehicle longitudinal direction (which are not illustrated), and asuspension 50 (see FIG. 3) which is provided on a right side of a frontportion of the vehicle is fixed to the suspension tower portion 1.

The suspension tower portion 1 includes its upper face portion having atwo-stage structure, which comprises an fastening face portion 10 towhich the suspension 50 is fixedly fastened and a top face portion 30which is provided at a higher level than the fastening face portion 10.The top face portion 30 is connected to a central portion of thefastening face portion 10 via a vertical wall portion 20. Further, anouter-peripheral wall portion 40 which extends downward is provided atan outer edge of the fastening face portion 10. These elements/membersare formed integrally by aluminum die casting, for example.

Plural fastening portions 11 to which an upper-side attachment portion51 (see FIG. 3) of the suspension 50 is fixedly fastened are formed atthe fastening face portion 10. In a plan view of FIG. 2, the fasteningportions 11 are formed at three points at roughly equal intervals havinga pitch P on a circumference around a central-axis line of thesuspension 50 fixedly fastened.

The top face portion 30 is provided to face the upper-side attachmentportion 51 of the suspension 50 fixedly fastened, which is formed in aroughly triangular shape having apexes which correspond to theabove-described fastening portions 11. Specifically, each apex portionof the top face portion 30 is configured to have a cutout formed in anarc shape having a cutout's center which corresponds to the fasteningportion 11. That is, the vertical wall portion 20 which connects thefastening face portion 10 and the top face portion 30 includes anarc-shaped arc wall portion 21 which is positioned at each apex portionof the roughly triangular-shaped top face portion 30 and a connectingwall portion 22 which is positioned at each side portion of the roughlytriangular-shaped top face portion 30.

More specifically, the arc-shaped wall portion 21 is formed only on theside of the central-axis line of the suspension 50 around the fasteningportion 11, not formed on the side of the outer-peripheral wall portion40. Therefore, the fastening portion 11 is configured to open on theside of the outer-peripheral wall portion 40 so as not to make waterstay there easily. Further, the arc-shaped wall portion 21 is configuredto be spaced apart from a fastening seat portion 3 b of a fastening nut3 to be fastened onto the fastening portion 11, having a roughlyconstant distance therebetween.

Herein, since the fastening nut 3 is a flange nut and the fastening seatportion 3 b of the fastening nut 3 is cylindrical in the presentembodiment, the arc-shaped wall portion 21 is formed in the arc shapehaving its arc center which is positioned at the fastening portion 11 inthe plan view. Further, the fastening nut 3 is a hexagon nut, and in acase in which the shape of the fastening seat portion 3 b is hexagonal,the arc-shaped wall portion 21 is formed in the arc shape having its arccenter which is positioned at the fastening portion so as to extendsubstantially along the hexagonal fastening seat portion 3 b in the planview. Also, in a case in which the fastening nut 3 is fastened to thefastening portion 11 via a washer (not illustrated), the arc-shaped wallportion 21 is configured to extend along a peripheral portion of thewasher in the plan view.

The connecting wall portion 22 is configured to straightly connect theadjacent arc-shaped wall portions 21.

FIG. 3 is a sectional view taken along of FIG. 2, which shows a verticalcross section of the suspension tower portion 1 which passes through aposition of the fastening portion 11. As shown in FIG. 3, at thefastening portion 11 are provided a tower-portion attachment hole 12which vertically penetrates the fastening face portion 10 and aflat-face-shaped fastening seat face portion 13 which is positionedaround the tower-portion attachment hole 12. Further, the suspension 50has a suspension attachment hole 52 which is located at a positioncorresponding to the tower-portion attachment hole 12 at its upper-sideattached portion 51.

The suspension 50 is fixedly fastened to a lower face of the fasteningface portion 10 in such a manner that three fastening bolts 2 areinserted into the attachment holes 52, 12 from below and the fasteningnuts 3 are fastened onto the fastening seat face portions 13.

Herein, the fastening seat face portion 13 is configured in a flat-faceshape having a specified size such that it roughly matches the fasteningseat portion 3 b of the fastening nut 3 fastened to the fasteningportion 11 or the fastening nut 3 is capable of being placed onto it.Further, the arc-shaped wall portion 21 is configured to rise from thefastening seat face portion 13 via a R portion 14, and to be spacedapart from the fastening seat portion 3 b of the fastening nut 3, havingthe roughly constant distance therebetween, as described above.Accordingly, the distance between the peripheral portion of thefastening seat portion 3 b of the fastening nut 3 and the R portion 14or the arc-shaped wall portion 21 is configured to be roughly constantin the circumferential direction.

The top face portion 30 includes an opening portion 31 which verticallypenetrates its central portion and a ring-shaped opening-portion rib 32which extends downward from the top face portion 30 around the openingportion 31. Referring to FIG. 2 as well, plural inner-peripheral-sideribs 33 which extend downward from a lower face of the top face portion30 are provided on an inner-peripheral side of the vertical wall portion20. The inner-peripheral-side ribs 33 are provided to extend radiallyfrom the opening-portion rib 32 so as to connect the opening-portion rib32 and the vertical wall portion 20.

The inner-peripheral-side ribs 33 are positioned above the suspension 50fixedly fastened to the fastening face portion 10 and located at aspecified level so as to contact the suspension 50 substantially or notto interfere with the suspension 50. Further, the inner-peripheral-sideribs 33 comprise each a first inner-peripheral-side rib 33A whichconnects the opening-portion rib 32 and the arc-shaped wall portion 21and a second inner-peripheral-side rib 33B which connects theopening-portion rib 32 and the connecting wall portions 22.

Specifically, the first inner-peripheral-side rib 33A is configured toconnect the opening-portion rib 32 and the arc-shaped wall portion 21with substantially the shortest distance, and a roughly middle portion21 a, in an extension direction, of an arc-shaped portion of thearc-shaped wall portion 21 is connected to the opening-portion rib 32via this first inner-peripheral-side rib 33A.

Likewise, the second inner-peripheral-side rib 33B is configured toconnect the opening-portion rib 32 and the connecting wall portion 22with substantially the shortest distance, and a roughly middle portion22 a, in a longitudinal direction, of the connecting wall portion 22 isconnected to the opening-portion rib 32 via this secondinner-peripheral-side rib 33B.

As shown in FIGS. 1 and 2, plural outer-peripheral-side ribs 23 areprovided at the upper face of the fastening face portion 10 on anouter-peripheral side of the vertical wall portion 20. Theouter-peripheral-side ribs 23 each extends radially toward theouter-peripheral wall portion 40.

The outer-peripheral-side rib 23 is configured to have a specifiedheight which is equal to or lower than that of the top face portion 30,and its height decreases gradually toward the outer-peripheral wallportion 40. Further, the outer-peripheral-side ribs 23 comprise sixfirst outer-peripheral-side ribs 23A which extend radially from both endportions, in the arc direction, of the arc-shaped wall portion 21 towardthe outer-peripheral wall portion 40 and three secondouter-peripheral-side ribs 23B which extend radially from the connectingwall portions 22 toward the outer-peripheral wall portion 40.

Herein, the second outer-peripheral-side rib 23B is configured to extendfrom the roughly middle portion 22 a, in the longitudinal direction, ofthe connecting wall portion 22, that is—to extend continuously to thesecond inner-peripheral-side rib 33B via the connecting wall portion 22.In other words, the second inner-peripheral-side rib 33B and the secondouter-peripheral-side rib 23B are configured to extend radially andcontinuously from the top face portion 30 via the vertical wall portion20 over the fastening face portion 10.

The connecting wall portion 22 and a pair of the firstinner-peripheral-side ribs 33A, 33B which are positioned on the bothsides of the connecting wall portion 22 are arranged at positions whichcorrespond to three sides of a triangle, respectively, in the plan view.

Next, performance/effects of the suspension tower portion structureaccording to the present embodiment will be described.

FIGS. 4A, 4B and 4C are vertical cross sections taken along line IV-IVof FIG. 2, which each passes through a position of the fastening portion11, which schematically show deformation of the suspension tower portion1 when a load is inputted in the vertical direction from the suspension50. FIG. 4A shows a state before deformation, FIG. 4B shows downwarddeformation, and FIG. 4C shows upward deformation.

As shown in FIG. 4A, the vertical-direction load is inputted to thefastening portion 11 from the upper-side attached portion 51 through thefastening bolt 2 and the fastening nut 3. Herein, the suspension towerportion 1 is deformed vertically in a dome shape with a neutral face ofa bending central face S which is positioned substantially at a middleposition, in the vertical direction, of a structure body, including theupper-side attached portion 51 of the suspension 50, the fastening faceportion 10, the vertical wall portion 20, and the top face portion 30.

That is, as shown in FIG. 4B, when the load is inputted downward fromthe suspension 50, the suspension tower portion 1 is deformed in thedome shape with the neutral face of the bending central face S in such amanner that it is curved downward. Likewise, as shown in FIG. 4C, whenthe load is inputted upward from the suspension 50, the suspension towerportion 1 is deformed in the dome shape with the neutral face of thebending central face S in such a manner that it is curved upward.

Herein, since the above-described embodiment is configured such that thetop face portion 30 is spaced apart from the bending central face S andthe inner-peripheral-side rib 33 is provided at the lower face of thetop face portion 30, the secondary cross-sectional moment of the crosssection, in the vertical direction, of a portion where theinner-peripheral-side rib 33 is provided, having a standard of thebending central face S, can be effectively increased, so that thevertical-direction rigidity can be improved. Consequently, since thevertical-direction rigidity of the suspension tower portion 1 isimproved effectively, the vertical deformation of the suspension towerportion 1 which is caused by the vertical load inputted from thesuspension 50 can be suppressed.

Moreover, since the inner-peripheral-side rib 33 is provided at thelower face of the top face portion 30, the suspension tower portion 1 issuppressed from being large sized upward.

Further, as shown in FIGS. 1 and 2, since the secondouter-peripheral-side rib 23B which is continuously connected to thesecond inner-peripheral-side rib 33B is provided via the connecting wallportion 22, a portion having the rigidity increased by the secondinner-peripheral-side rib 33B and another portion having the rigidityincreased by the second outer-peripheral-side rib 23B are continuousfrom each other, without being separated. Thereby, a radial-shaped ribwhich continuously extends from the inner peripheral side to theouter-peripheral side of the connecting wall portion 22 can be formed bythe second inner-peripheral-side rib 33B and the secondouter-peripheral-side rib 23B, the vertical-direction rigidity of theupper portion of the suspension tower portion 1 can be improved over awide range from the top face portion 30 to the fastening face portion10. Thereby, the vertical rigidity of the suspension tower portion 1 canbe improved more effectively.

Moreover, since the second outer-peripheral-side ribs 23B extend each tothe upper portion of the outer-peripheral wall portion 40, the rigidityof the second outer-peripheral-side rib 23B can be increased by makingthe second outer-peripheral-side rib 23B properly long and extend to theouter-peripheral wall portion 40. Accordingly, the vertical-directionrigidity of the suspension tower portion 1 can be improved furthereffectively.

Also, the rigidity of the top face portion 30 can be improved by theopening-portion rib 32 and the rigidity of the top face portion 30 canbe further improved by connecting the opening-portion rib 32 and thevertical wall portion 20 via the inner-peripheral-side rib 33.Accordingly, the vertical-direction rigidity of the suspension towerportion 1 can be improved further effectively.

Further, since the respective fastening portions 11 are straightlyconnected to each other by the connecting wall portions 22 via thearc-shaped wall portions 21 positioned around the fastening portions 11in the above-described embodiment, scaling of the forming pitch Pbetween the respective fastening portions 11 can be suppressed. Forexample, when the vertical load is inputted from the suspension 50, thescaling of the forming pitch P between the respective fastening portions11 which is caused by the dome-shaped deformation of the fastening faceportion 10 can be suppressed. And, the dome-shaped deformation of thefastening face portion 10 is suppressed by suppressing the scalingbetween the fastening portions 11. Thereby, the vertical rigidity of thesuspension tower portion 1 can be improved effectively.

Moreover, since the connecting wall portions 22 are located at thepositions which correspond to the sides of the triangle in the planview, the rigidity of the connecting wall portions 22 can be effectivelyimproved by the effect of a truss structure and the scaling of theforming pitch P between the respective fastening portions 11 can besuppressed. Thereby the vertical rigidity of the suspension towerportion 1 can be improved further effectively.

Further, since the connecting wall portions 22 and the firstinner-peripheral-side ribs 33A, 33A which are positioned on the bothsides are located at the positions corresponding to the sides of thetriangular in the plan view, the rigidity of the connecting wallportions 22 and the first inner-peripheral-side ribs 33A can be improvedmore. Thereby, the scaling of the forming pitch P between the respectivefastening portions 11 can be effectively suppressed more. Thereby thevertical rigidity of the suspension tower portion 1 can be improved moreeffectively.

Also, the fastening seat face portion 13 of the fastening portion 11 ofthe present embodiment is configured in the shape having the minimumsize such that it roughly matches the fastening seat portion 3 b of thefastening nut 3 or the fastening nut 3 is capable of being placed ontoit. That is, since a non-fastening portion (a flat face portion) of thefastening seat face portion 13 which is not fastened by the fasteningnut 3 is small, a decrease of the face rigidity of the fastening seatface portion 13 which is caused by the non-fastening portion issuppressed.

Further, the arc-shaped wall portion 21 is provided to rise from thefastening seat face portion 13 via the R portion 14, and extend alongthe fastening seat portion 3 b of the fastening nut 3 fastened onto thefastening portion 11, having the constant distance between them in theplan view. That is, the rigidity of the fastening portion 11 is improvedroughly uniformly on the side of the central-axis line of the suspension50 by the arc-shaped wall portion 21.

Herein, while a stress which is generated on the side of thecentral-axis line of the suspension 50 at the fastening portion 11 bythe load inputted in the vertical direction from the suspension 50 isrelatively great, the rigidity of the fastening portion 11 is improvedroughly uniformly on the side of the central-axis line of the suspension50 as described above. Accordingly, the stress generated at thefastening portion 11 is substantially equalized at the peripheralportion of the fastening seat portion 3 b of the fastening nut 3 on theside of the central-axis line of the suspension 50, so that any improperlocal stress concentration is prevented. Thereby, the vertical-directionrigidity of the suspension tower portion 1 can be improved effectively.

Also, since the first outer-peripheral-side rib 23A extends from theboth end portions of the arc-shaped wall portion 21 to theouter-peripheral wall portion 40, the rigidity of the fastening faceportion 10 is improved over a wide range from the arc-shaped wallportion 21 to the outer-peripheral wall portion 40. Thereby, thevertical-direction rigidity of the suspension tower portion 1 can beimproved more effectively.

Herein, the above-described embodiment is configured such that thearc-shaped wall portion 21 is formed on the inner-peripheral side only,not formed on the side of the outer-peripheral wall portion 40, in orderto prevent the water from staying. However, in a case in which anothercountermeasure against the water staying, such as a cover, or there isno problem with the water staying at the fastening portion 11, acylindrical wall portion 121 which surrounds an entire periphery of afastening portion 111 may be provided like a suspension tower portion100 according to a modification shown in FIG. 5. In this case, aconnecting wall portion 122 may be formed straightly so that theconnecting wall portion 122 tangentially connects to an edge portion ofthe cylindrical wall portion 121 on the side of an outer-peripheral wallportion 140.

Further, plural first inner-peripheral-side ribs 133A (three, forexample) which each connect the opening-portion rib 131 and thecylindrical wall portion 121 may be provided. Thereby, the connectionrigidity of the cylindrical wall portion 121, the top face portion 130,and the first inner-peripheral-side ribs 133A can be further improved.

Also, the suspension tower portion structure may be made by casting orforging using iron or other light metal than aluminum, instead of thealuminum die casting. Alternatively, it may be made by pressing of asteel plate or joining of plural members, such as welding. Instead, thesuspension tower portion structure may be made from CFRP (carbon-fiberreinforced plastic).

The rib may be formed by a raw material, by joining members which hasbeen formed separately, or by pressing. The vertical wall portion may beprovided in place of the rib, and the rib may be provided in place ofthe vertical wall portion.

While the above-described embodiment is configured such that thefastening portions 11 are composed of three portions, two portions orfour or more portions may constitute the fastening portions 11. In anycase, an arc-shaped wall portion which encloses the circumference of thefastening portion 11 on the central side in an arc shape or in acylindrical shape can be provided and also the adjacent arc-shaped wallportions (cylindrical wall portions) can be straightly connected by theconnecting wall portion. Moreover, the inner-peripheral-side rib can beprovided at the lower face of the top face portion which is formed bythe arc-shaped wall portion (cylindrical wall portion) and theconnecting wall portion at the higher level. Herein, it may beunnecessary to form an opening portion at the top face portion in a casein which the fastening portions 11 are composed of two portions.

While the above-described embodiment described the suspension towerportion structure for fixing the front suspension, the present inventionis applicable to a suspension tower portion structure for fixing a rearsuspension.

The present invention should not be limited to the above-describedembodiments, and any other modifications or improvements may be appliedwithin the scope of a spirit of the present invention.

What is claimed is:
 1. A suspension tower portion structure of avehicle, wherein an upper face portion of the suspension tower portioncomprises a fastening face portion where plural fastening portions towhich an upper end portion of a suspension is fixedly fastened areprovided and a top face portion which is provided at a higher level thanthe fastening face portion so as to face the upper end portion of thesuspension, the top face portion being connected to a central portion ofthe fastening face portion via a vertical wall portion, and aninner-peripheral-side rib at a lower face of the top face portion isprovided on an inner-peripheral side of the vertical wall portion. 2.The suspension tower portion structure of the vehicle of claim 1,wherein an outer-peripheral-side rib is provided at the fastening faceportion on an outer-peripheral side of the vertical wall portion, andthe inner-peripheral-side rib and the outer-peripheral-side rib arecontinuously connected via the vertical wall portion.
 3. The suspensiontower portion structure of the vehicle of claim 2, wherein anouter-peripheral wall portion which extends downward from an outer edgeof the fastening face portion is provided, and the outer-peripheral-siderib extends to the outer-peripheral wall portion.
 4. The suspensiontower portion structure of the vehicle of claim 1, wherein at least apart of the inner-peripheral-side rib is provided on a line whichconnects a central-axis line of the suspension to the fastening portion.5. The suspension tower portion structure of the vehicle of claim 1,wherein a lower end portion of the inner-peripheral-side rib is locatedso as to contact the suspension substantially.
 6. The suspension towerportion structure of the vehicle of claim 1, wherein the vertical wallportion comprises a connecting wall portion which is extended so as toconnect each two of the plural fastening portions, and theinner-peripheral-side rib is provided on the connecting wall portion. 7.A suspension tower portion structure of a vehicle, wherein an upper faceportion of the suspension tower portion comprises a fastening faceportion where plural fastening portions to which an upper end portion ofa suspension is fixedly fastened are provided and a top face portionwhich is provided at a higher level than the fastening face portion soas to face the upper end portion of the suspension, the top face portionbeing connected to a central portion of the fastening face portion via avertical wall portion, and an inner-peripheral-side rib is provided onan inner-peripheral side of the vertical wall portion, wherein at thetop face portion are formed an opening portion which faces the upper endportion of the suspension and an opening-portion rib which projectsdownward at a periphery of the opening portion, and the opening-portionrib and the vertical wall portion are connected by theinner-peripheral-side rib.
 8. A suspension tower portion structure of avehicle, wherein an upper face portion of the suspension tower portioncomprises a fastening face portion where plural fastening portions towhich an upper end portion of a suspension is fixedly fastened areprovided and a top face portion which is provided at a higher level thanthe fastening face portion so as to face the upper end portion of thesuspension, the top face portion being connected to a central portion ofthe fastening face portion via a vertical wall portion, wherein at thetop face portion are formed an opening portion which faces the upper endportion of the suspension and an opening-portion rib which projectsdownward at a periphery of the opening portion, and a lower end portionof the opening-portion rib is located so as to contact the suspensionsubstantially.